1 ;;; simple.el --- basic editing commands for Emacs
3 ;; Copyright (C) 1985, 1986, 1987, 1993, 1994 Free Software Foundation, Inc.
5 ;; This file is part of GNU Emacs.
7 ;; GNU Emacs is free software; you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 2, or (at your option)
12 ;; GNU Emacs is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GNU Emacs; see the file COPYING. If not, write to
19 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 ;; A grab-bag of basic Emacs commands not specifically related to some
24 ;; major mode or to file-handling.
28 (defun open-line (arg)
29 "Insert a newline and leave point before it.
30 If there is a fill prefix, insert the fill prefix on the new line
31 if the line would have been empty.
32 With arg N, insert N newlines."
34 (let* ((do-fill-prefix (and fill-prefix
(bolp)))
35 (flag (and (null do-fill-prefix
) (bolp) (not (bobp)))))
36 ;; If this is a simple case, and we are at the beginning of a line,
37 ;; actually insert the newline *before* the preceding newline
38 ;; instead of after. That makes better display behavior.
41 ;; If undo is enabled, don't let this hack be visible:
42 ;; record the real value of point as the place to move back to
43 ;; if we undo this insert.
44 (if (not (eq buffer-undo-list t
))
45 (setq buffer-undo-list
(cons (point) buffer-undo-list
)))
49 (if do-fill-prefix
(insert fill-prefix
))
53 (if flag
(forward-char 1))))
56 "Split current line, moving portion beyond point vertically down."
58 (skip-chars-forward " \t")
59 (let ((col (current-column))
65 (defun quoted-insert (arg)
66 "Read next input character and insert it.
67 This is useful for inserting control characters.
68 You may also type up to 3 octal digits, to insert a character with that code.
70 In overwrite mode, this function inserts the character anyway, and
71 does not handle octal digits specially. This means that if you use
72 overwrite as your normal editing mode, you can use this function to
73 insert characters when necessary.
75 In binary overwrite mode, this function does overwrite, and octal
76 digits are interpreted as a character code. This is supposed to make
77 this function useful in editing binary files."
79 (let ((char (if (or (not overwrite-mode
)
80 (eq overwrite-mode
'overwrite-mode-binary
))
83 (if (eq overwrite-mode
'overwrite-mode-binary
)
85 (insert-char char arg
)))
87 (defun delete-indentation (&optional arg
)
88 "Join this line to previous and fix up whitespace at join.
89 If there is a fill prefix, delete it from the beginning of this line.
90 With argument, join this line to following line."
93 (if arg
(forward-line 1))
94 (if (eq (preceding-char) ?
\n)
96 (delete-region (point) (1- (point)))
97 ;; If the second line started with the fill prefix,
100 (<= (+ (point) (length fill-prefix
)) (point-max))
102 (buffer-substring (point)
103 (+ (point) (length fill-prefix
)))))
104 (delete-region (point) (+ (point) (length fill-prefix
))))
105 (fixup-whitespace))))
107 (defun fixup-whitespace ()
108 "Fixup white space between objects around point.
109 Leave one space or none, according to the context."
112 (delete-horizontal-space)
113 (if (or (looking-at "^\\|\\s)")
114 (save-excursion (forward-char -
1)
115 (looking-at "$\\|\\s(\\|\\s'")))
119 (defun delete-horizontal-space ()
120 "Delete all spaces and tabs around point."
122 (skip-chars-backward " \t")
123 (delete-region (point) (progn (skip-chars-forward " \t") (point))))
125 (defun just-one-space ()
126 "Delete all spaces and tabs around point, leaving one space."
128 (skip-chars-backward " \t")
129 (if (= (following-char) ?
)
132 (delete-region (point) (progn (skip-chars-forward " \t") (point))))
134 (defun delete-blank-lines ()
135 "On blank line, delete all surrounding blank lines, leaving just one.
136 On isolated blank line, delete that one.
137 On nonblank line, delete all blank lines that follow it."
139 (let (thisblank singleblank
)
142 (setq thisblank
(looking-at "[ \t]*$"))
143 ;; Set singleblank if there is just one blank line here.
146 (not (looking-at "[ \t]*\n[ \t]*$"))
148 (progn (forward-line -
1)
149 (not (looking-at "[ \t]*$")))))))
150 ;; Delete preceding blank lines, and this one too if it's the only one.
154 (if singleblank
(forward-line 1))
155 (delete-region (point)
156 (if (re-search-backward "[^ \t\n]" nil t
)
157 (progn (forward-line 1) (point))
159 ;; Delete following blank lines, unless the current line is blank
160 ;; and there are no following blank lines.
161 (if (not (and thisblank singleblank
))
165 (delete-region (point)
166 (if (re-search-forward "[^ \t\n]" nil t
)
167 (progn (beginning-of-line) (point))
169 ;; Handle the special case where point is followed by newline and eob.
170 ;; Delete the line, leaving point at eob.
171 (if (looking-at "^[ \t]*\n\\'")
172 (delete-region (point) (point-max)))))
174 (defun back-to-indentation ()
175 "Move point to the first non-whitespace character on this line."
177 (beginning-of-line 1)
178 (skip-chars-forward " \t"))
180 (defun newline-and-indent ()
181 "Insert a newline, then indent according to major mode.
182 Indentation is done using the value of `indent-line-function'.
183 In programming language modes, this is the same as TAB.
184 In some text modes, where TAB inserts a tab, this command indents to the
185 column specified by the variable `left-margin'."
187 (delete-region (point) (progn (skip-chars-backward " \t") (point)))
189 (indent-according-to-mode))
191 (defun reindent-then-newline-and-indent ()
192 "Reindent current line, insert newline, then indent the new line.
193 Indentation of both lines is done according to the current major mode,
194 which means calling the current value of `indent-line-function'.
195 In programming language modes, this is the same as TAB.
196 In some text modes, where TAB inserts a tab, this indents to the
197 column specified by the variable `left-margin'."
200 (delete-region (point) (progn (skip-chars-backward " \t") (point)))
201 (indent-according-to-mode))
203 (indent-according-to-mode))
205 ;; Internal subroutine of delete-char
206 (defun kill-forward-chars (arg)
207 (if (listp arg
) (setq arg
(car arg
)))
208 (if (eq arg
'-
) (setq arg -
1))
209 (kill-region (point) (+ (point) arg
)))
211 ;; Internal subroutine of backward-delete-char
212 (defun kill-backward-chars (arg)
213 (if (listp arg
) (setq arg
(car arg
)))
214 (if (eq arg
'-
) (setq arg -
1))
215 (kill-region (point) (- (point) arg
)))
217 (defun backward-delete-char-untabify (arg &optional killp
)
218 "Delete characters backward, changing tabs into spaces.
219 Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil.
220 Interactively, ARG is the prefix arg (default 1)
221 and KILLP is t if prefix arg is was specified."
222 (interactive "*p\nP")
225 (while (and (> count
0) (not (bobp)))
226 (if (= (preceding-char) ?
\t)
227 (let ((col (current-column)))
229 (setq col
(- col
(current-column)))
233 (setq count
(1- count
)))))
234 (delete-backward-char arg killp
)
235 ;; In overwrite mode, back over columns while clearing them out,
236 ;; unless at end of line.
237 (and overwrite-mode
(not (eolp))
238 (save-excursion (insert-char ?\ arg
))))
240 (defun zap-to-char (arg char
)
241 "Kill up to and including ARG'th occurrence of CHAR.
242 Goes backward if ARG is negative; error if CHAR not found."
243 (interactive "p\ncZap to char: ")
244 (kill-region (point) (progn
245 (search-forward (char-to-string char
) nil nil arg
)
246 ; (goto-char (if (> arg 0) (1- (point)) (1+ (point))))
249 (defun beginning-of-buffer (&optional arg
)
250 "Move point to the beginning of the buffer; leave mark at previous position.
251 With arg N, put point N/10 of the way from the true beginning.
253 Don't use this command in Lisp programs!
254 \(goto-char (point-min)) is faster and avoids clobbering the mark."
258 (if (> (buffer-size) 10000)
259 ;; Avoid overflow for large buffer sizes!
260 (* (prefix-numeric-value arg
)
261 (/ (buffer-size) 10))
262 (/ (+ 10 (* (buffer-size) (prefix-numeric-value arg
))) 10))
264 (if arg
(forward-line 1)))
266 (defun end-of-buffer (&optional arg
)
267 "Move point to the end of the buffer; leave mark at previous position.
268 With arg N, put point N/10 of the way from the true end.
270 Don't use this command in Lisp programs!
271 \(goto-char (point-max)) is faster and avoids clobbering the mark."
275 (- (1+ (buffer-size))
276 (if (> (buffer-size) 10000)
277 ;; Avoid overflow for large buffer sizes!
278 (* (prefix-numeric-value arg
)
279 (/ (buffer-size) 10))
280 (/ (* (buffer-size) (prefix-numeric-value arg
)) 10)))
282 ;; If we went to a place in the middle of the buffer,
283 ;; adjust it to the beginning of a line.
284 (if arg
(forward-line 1)
285 ;; If the end of the buffer is not already on the screen,
286 ;; then scroll specially to put it near, but not at, the bottom.
287 (if (let ((old-point (point)))
289 (goto-char (window-start))
290 (vertical-motion (window-height))
291 (< (point) old-point
)))
294 (defun mark-whole-buffer ()
295 "Put point at beginning and mark at end of buffer.
296 You probably should not use this function in Lisp programs;
297 it is usually a mistake for a Lisp function to use any subroutine
298 that uses or sets the mark."
301 (push-mark (point-max) nil t
)
302 (goto-char (point-min)))
304 (defun count-lines-region (start end
)
305 "Print number of lines and characters in the region."
307 (message "Region has %d lines, %d characters"
308 (count-lines start end
) (- end start
)))
311 "Print the current line number (in the buffer) of point."
318 (1+ (count-lines 1 (point)))))))
320 (defun count-lines (start end
)
321 "Return number of lines between START and END.
322 This is usually the number of newlines between them,
323 but can be one more if START is not equal to END
324 and the greater of them is not at the start of a line."
328 (narrow-to-region start end
)
329 (goto-char (point-min))
330 (if (eq selective-display t
)
332 (while (re-search-forward "[\n\C-m]" nil t
40)
333 (setq done
(+ 40 done
)))
334 (while (re-search-forward "[\n\C-m]" nil t
1)
335 (setq done
(+ 1 done
)))
336 (goto-char (point-max))
337 (if (and (/= start end
)
341 (- (buffer-size) (forward-line (buffer-size))))))))
343 (defun what-cursor-position ()
344 "Print info on cursor position (on screen and within buffer)."
346 (let* ((char (following-char))
350 (total (buffer-size))
351 (percent (if (> total
50000)
352 ;; Avoid overflow from multiplying by 100!
353 (/ (+ (/ total
200) (1- pos
)) (max (/ total
100) 1))
354 (/ (+ (/ total
2) (* 100 (1- pos
))) (max total
1))))
355 (hscroll (if (= (window-hscroll) 0)
357 (format " Hscroll=%d" (window-hscroll))))
358 (col (current-column)))
360 (if (or (/= beg
1) (/= end
(1+ total
)))
361 (message "point=%d of %d(%d%%) <%d - %d> column %d %s"
362 pos total percent beg end col hscroll
)
363 (message "point=%d of %d(%d%%) column %d %s"
364 pos total percent col hscroll
))
365 (if (or (/= beg
1) (/= end
(1+ total
)))
366 (message "Char: %s (0%o) point=%d of %d(%d%%) <%d - %d> column %d %s"
367 (single-key-description char
) char pos total percent beg end col hscroll
)
368 (message "Char: %s (0%o) point=%d of %d(%d%%) column %d %s"
369 (single-key-description char
) char pos total percent col hscroll
)))))
371 (defun fundamental-mode ()
372 "Major mode not specialized for anything in particular.
373 Other major modes are defined by comparison with this one."
375 (kill-all-local-variables))
377 (defvar read-expression-map
(cons 'keymap minibuffer-local-map
)
378 "Minibuffer keymap used for reading Lisp expressions.")
379 (define-key read-expression-map
"\M-\t" 'lisp-complete-symbol
)
381 (put 'eval-expression
'disabled t
)
383 (defvar read-expression-history nil
)
385 ;; We define this, rather than making `eval' interactive,
386 ;; for the sake of completion of names like eval-region, eval-current-buffer.
387 (defun eval-expression (expression)
388 "Evaluate EXPRESSION and print value in minibuffer.
389 Value is also consed on to front of the variable `values'."
391 (list (read-from-minibuffer "Eval: "
392 nil read-expression-map t
393 'read-expression-history
)))
394 (setq values
(cons (eval expression
) values
))
395 (prin1 (car values
) t
))
397 (defun edit-and-eval-command (prompt command
)
398 "Prompting with PROMPT, let user edit COMMAND and eval result.
399 COMMAND is a Lisp expression. Let user edit that expression in
400 the minibuffer, then read and evaluate the result."
401 (let ((command (read-from-minibuffer prompt
402 (prin1-to-string command
)
403 read-expression-map t
404 '(command-history .
1))))
407 (defun repeat-complex-command (arg)
408 "Edit and re-evaluate last complex command, or ARGth from last.
409 A complex command is one which used the minibuffer.
410 The command is placed in the minibuffer as a Lisp form for editing.
411 The result is executed, repeating the command as changed.
412 If the command has been changed or is not the most recent previous command
413 it is added to the front of the command history.
414 You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element]
415 to get different commands to edit and resubmit."
417 (let ((elt (nth (1- arg
) command-history
))
418 (minibuffer-history-position arg
)
419 (minibuffer-history-sexp-flag t
)
424 (read-from-minibuffer
425 "Redo: " (prin1-to-string elt
) read-expression-map t
426 (cons 'command-history arg
)))
428 ;; If command was added to command-history as a string,
429 ;; get rid of that. We want only evallable expressions there.
430 (if (stringp (car command-history
))
431 (setq command-history
(cdr command-history
)))
433 ;; If command to be redone does not match front of history,
434 ;; add it to the history.
435 (or (equal newcmd
(car command-history
))
436 (setq command-history
(cons newcmd command-history
)))
440 (defvar minibuffer-history nil
441 "Default minibuffer history list.
442 This is used for all minibuffer input
443 except when an alternate history list is specified.")
444 (defvar minibuffer-history-sexp-flag nil
445 "Nonzero when doing history operations on `command-history'.
446 More generally, indicates that the history list being acted on
447 contains expressions rather than strings.")
448 (setq minibuffer-history-variable
'minibuffer-history
)
449 (setq minibuffer-history-position nil
)
450 (defvar minibuffer-history-search-history nil
)
453 (lambda (key-and-command)
455 (lambda (keymap-and-completionp)
456 ;; Arg is (KEYMAP-SYMBOL . COMPLETION-MAP-P).
457 ;; If the cdr of KEY-AND-COMMAND (the command) is a cons,
458 ;; its car is used if COMPLETION-MAP-P is nil, its cdr if it is t.
459 (define-key (symbol-value (car keymap-and-completionp
))
460 (car key-and-command
)
461 (let ((command (cdr key-and-command
)))
463 ;; (and ... nil) => ... turns back on the completion-oriented
464 ;; history commands which rms turned off since they seem to
465 ;; do things he doesn't like.
466 (if (and (cdr keymap-and-completionp
) nil
) ;XXX turned off
467 (progn (error "EMACS BUG!") (cdr command
))
470 '((minibuffer-local-map . nil
)
471 (minibuffer-local-ns-map . nil
)
472 (minibuffer-local-completion-map . t
)
473 (minibuffer-local-must-match-map . t
)
474 (read-expression-map . nil
))))
475 '(("\en" .
(next-history-element . next-complete-history-element
))
476 ([next] . (next-history-element . next-complete-history-element))
477 ("\ep" . (previous-history-element . previous-complete-history-element))
478 ([prior] . (previous-history-element . previous-complete-history-element))
479 ("\er" . previous-matching-history-element)
480 ("\es" . next-matching-history-element)))
482 (defun previous-matching-history-element (regexp n)
483 "Find the previous history element that matches REGEXP.
484 \(Previous history elements refer to earlier actions.)
485 With prefix argument N, search for Nth previous match.
486 If N is negative, find the next or Nth next match."
488 (let* ((enable-recursive-minibuffers t)
489 (minibuffer-history-sexp-flag nil)
490 (regexp (read-from-minibuffer "Previous element matching (regexp): "
494 'minibuffer-history-search-history)))
495 ;; Use the last regexp specified, by default, if input is empty.
496 (list (if (string= regexp "")
497 (setcar minibuffer-history-search-history
498 (nth 1 minibuffer-history-search-history))
500 (prefix-numeric-value current-prefix-arg))))
501 (let ((history (symbol-value minibuffer-history-variable))
503 (pos minibuffer-history-position))
506 (setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history)))
509 "No later matching history item"
510 "No earlier matching history item")))
511 (if (string-match regexp
512 (if minibuffer-history-sexp-flag
513 (prin1-to-string (nth (1- pos) history))
514 (nth (1- pos) history)))
515 (setq n (+ n (if (< n 0) 1 -1)))))
516 (setq minibuffer-history-position pos)
518 (let ((elt (nth (1- pos) history)))
519 (insert (if minibuffer-history-sexp-flag
520 (prin1-to-string elt)
522 (goto-char (point-min)))
523 (if (or (eq (car (car command-history)) 'previous-matching-history-element)
524 (eq (car (car command-history)) 'next-matching-history-element))
525 (setq command-history (cdr command-history))))
527 (defun next-matching-history-element (regexp n)
528 "Find the next history element that matches REGEXP.
529 \(The next history element refers to a more recent action.)
530 With prefix argument N, search for Nth next match.
531 If N is negative, find the previous or Nth previous match."
533 (let* ((enable-recursive-minibuffers t)
534 (minibuffer-history-sexp-flag nil)
535 (regexp (read-from-minibuffer "Next element matching (regexp): "
539 'minibuffer-history-search-history)))
540 ;; Use the last regexp specified, by default, if input is empty.
541 (list (if (string= regexp "")
542 (setcar minibuffer-history-search-history
543 (nth 1 minibuffer-history-search-history))
545 (prefix-numeric-value current-prefix-arg))))
546 (previous-matching-history-element regexp (- n)))
548 (defun next-history-element (n)
549 "Insert the next element of the minibuffer history into the minibuffer."
551 (let ((narg (min (max 1 (- minibuffer-history-position n))
552 (length (symbol-value minibuffer-history-variable)))))
553 (if (= minibuffer-history-position narg)
554 (error (if (= minibuffer-history-position 1)
555 "End of history; no next item"
556 "Beginning of history; no preceding item"))
558 (setq minibuffer-history-position narg)
559 (let ((elt (nth (1- minibuffer-history-position)
560 (symbol-value minibuffer-history-variable))))
562 (if minibuffer-history-sexp-flag
563 (prin1-to-string elt)
565 (goto-char (point-min)))))
567 (defun previous-history-element (n)
568 "Inserts the previous element of the minibuffer history into the minibuffer."
570 (next-history-element (- n)))
572 (defun next-complete-history-element (n)
573 "Get next element of history which is a completion of minibuffer contents."
575 (let ((point-at-start (point)))
576 (next-matching-history-element
577 (concat "^" (regexp-quote (buffer-substring (point-min) (point)))) n)
578 ;; next-matching-history-element always puts us at (point-min).
579 ;; Move to the position we were at before changing the buffer contents.
580 ;; This is still sensical, because the text before point has not changed.
581 (goto-char point-at-start)))
583 (defun previous-complete-history-element (n)
585 Get previous element of history which is a completion of minibuffer contents."
587 (next-complete-history-element (- n)))
589 (defun goto-line (arg)
590 "Goto line ARG, counting from line 1 at beginning of buffer."
591 (interactive "NGoto line: ")
595 (if (eq selective-display t)
596 (re-search-forward "[\n\C-m]" nil 'end (1- arg))
597 (forward-line (1- arg)))))
599 ;Put this on C-x u, so we can force that rather than C-_ into startup msg
600 (define-function 'advertised-undo 'undo)
602 (defun undo (&optional arg)
603 "Undo some previous changes.
604 Repeat this command to undo more changes.
605 A numeric argument serves as a repeat count."
607 ;; If we don't get all the way thru, make last-command indicate that
608 ;; for the following command.
609 (setq this-command t)
610 (let ((modified (buffer-modified-p))
611 (recent-save (recent-auto-save-p)))
612 (or (eq (selected-window) (minibuffer-window))
614 (or (eq last-command 'undo)
617 (undo-more (or arg 1))
618 ;; Don't specify a position in the undo record for the undo command.
619 ;; Instead, undoing this should move point to where the change is.
620 (let ((tail buffer-undo-list)
622 (while (and tail (not done) (not (null (car tail))))
623 (if (integerp (car tail))
626 (setq buffer-undo-list (delq (car tail) buffer-undo-list))))
627 (setq tail (cdr tail))))
628 (and modified (not (buffer-modified-p))
629 (delete-auto-save-file-if-necessary recent-save)))
630 ;; If we do get all the way thru, make this-command indicate that.
631 (setq this-command 'undo))
633 (defvar pending-undo-list nil
634 "Within a run of consecutive undo commands, list remaining to be undone.")
637 "Set `pending-undo-list' to the front of the undo list.
638 The next call to `undo-more' will undo the most recently made change."
639 (if (eq buffer-undo-list t)
640 (error "No undo information in this buffer"))
641 (setq pending-undo-list buffer-undo-list))
643 (defun undo-more (count)
644 "Undo back N undo-boundaries beyond what was already undone recently.
645 Call `undo-start' to get ready to undo recent changes,
646 then call `undo-more' one or more times to undo them."
647 (or pending-undo-list
648 (error "No further undo information"))
649 (setq pending-undo-list (primitive-undo count pending-undo-list)))
651 (defvar shell-command-history nil
652 "History list for some commands that read shell commands.")
654 (defun shell-command (command &optional flag)
655 "Execute string COMMAND in inferior shell; display output, if any.
656 If COMMAND ends in ampersand, execute it asynchronously.
658 Optional second arg non-nil (prefix arg, if interactive)
659 means insert output in current buffer after point (leave mark after it).
660 This cannot be done asynchronously."
661 (interactive (list (read-from-minibuffer "Shell command: "
662 nil nil nil 'shell-command-history)
665 (progn (barf-if-buffer-read-only)
667 ;; We do not use -f for csh; we will not support broken use of
668 ;; .cshrcs. Even the BSD csh manual says to use
669 ;; "if ($?prompt) exit" before things which are not useful
670 ;; non-interactively. Besides, if someone wants their other
671 ;; aliases for shell commands then they can still have them.
672 (call-process shell-file-name nil t nil
674 ;; This is like exchange-point-and-mark, but doesn't activate the mark.
675 ;; It is cleaner to avoid activation, even though the command
676 ;; loop would deactivate the mark because we inserted text.
677 (goto-char (prog1 (mark t)
678 (set-marker (mark-marker) (point)
680 ;; Preserve the match data in case called from a program.
681 (let ((data (match-data)))
683 (if (string-match "[ \t]*&[ \t]*$" command)
684 ;; Command ending with ampersand means asynchronous.
685 (let ((buffer (get-buffer-create "*shell-command*"))
686 (directory default-directory)
688 ;; Remove the ampersand.
689 (setq command (substring command 0 (match-beginning 0)))
690 ;; If will kill a process, query first.
691 (setq proc (get-buffer-process buffer))
693 (if (yes-or-no-p "A command is running. Kill it? ")
695 (error "Shell command in progress")))
699 (display-buffer buffer)
700 (setq default-directory directory)
701 (setq proc (start-process "Shell" buffer
702 shell-file-name "-c" command))
703 (setq mode-line-process '(": %s"))
704 (set-process-sentinel proc 'shell-command-sentinel)
705 (set-process-filter proc 'shell-command-filter)
707 (shell-command-on-region (point) (point) command nil))
708 (store-match-data data)))))
710 ;; We have a sentinel to prevent insertion of a termination message
711 ;; in the buffer itself.
712 (defun shell-command-sentinel (process signal)
713 (if (and (memq (process-status process) '(exit signal))
714 (buffer-name (process-buffer process)))
717 (car (cdr (cdr (process-command process))))
718 (substring signal 0 -1))
720 (set-buffer (process-buffer process))
721 (setq mode-line-process nil))
722 (delete-process process))))
724 (defun shell-command-filter (proc string)
725 ;; Do save-excursion by hand so that we can leave point numerically unchanged
726 ;; despite an insertion immediately after it.
727 (let* ((obuf (current-buffer))
728 (buffer (process-buffer proc))
730 (window (get-buffer-window buffer))
731 (pos (window-start window)))
735 (or (= (point) (point-max))
736 (setq opoint (point)))
737 (goto-char (point-max))
738 (insert-before-markers string))
739 ;; insert-before-markers moved this marker: set it back.
740 (set-window-start window pos)
741 ;; Finish our save-excursion.
746 (defun shell-command-on-region (start end command &optional flag interactive)
747 "Execute string COMMAND in inferior shell with region as input.
748 Normally display output (if any) in temp buffer `*Shell Command Output*';
749 Prefix arg means replace the region with it.
750 Noninteractive args are START, END, COMMAND, FLAG.
751 Noninteractively FLAG means insert output in place of text from START to END,
752 and put point at the end, but don't alter the mark.
754 If the output is one line, it is displayed in the echo area,
755 but it is nonetheless available in buffer `*Shell Command Output*'
756 even though that buffer is not automatically displayed. If there is no output
757 or output is inserted in the current buffer then `*Shell Command Output*' is
759 (interactive (list (region-beginning) (region-end)
760 (read-from-minibuffer "Shell command on region: "
761 nil nil nil 'shell-command-history)
763 (prefix-numeric-value current-prefix-arg)))
765 ;; Replace specified region with output from command.
766 (let ((swap (and interactive (< (point) (mark)))))
767 ;; Don't muck with mark
768 ;; unless called interactively.
769 (and interactive (push-mark))
770 (call-process-region start end shell-file-name t t nil
772 (if (get-buffer "*Shell Command Output*")
773 (kill-buffer "*Shell Command Output*"))
774 (and interactive swap (exchange-point-and-mark)))
775 ;; No prefix argument: put the output in a temp buffer,
776 ;; replacing its entire contents.
777 (let ((buffer (get-buffer-create "*Shell Command Output*"))
780 (if (eq buffer (current-buffer))
781 ;; If the input is the same buffer as the output,
782 ;; delete everything but the specified region,
783 ;; then replace that region with the output.
784 (progn (delete-region end (point-max))
785 (delete-region (point-min) start)
786 (call-process-region (point-min) (point-max)
787 shell-file-name t t nil
790 ;; Clear the output buffer, then run the command with output there.
794 (call-process-region start end shell-file-name
798 ;; Report the amount of output.
799 (let ((lines (save-excursion
801 (if (= (buffer-size) 0)
803 (count-lines (point-min) (point-max))))))
806 (message "(Shell command completed with no output)"))
807 (kill-buffer buffer))
808 ((and success (= lines 1))
812 (goto-char (point-min))
813 (buffer-substring (point)
814 (progn (end-of-line) (point)))))
815 (kill-buffer buffer))
817 (set-window-start (display-buffer buffer) 1))))))))
819 (defun universal-argument ()
820 "Begin a numeric argument for the following command.
821 Digits or minus sign following \\[universal-argument] make up the numeric argument.
822 \\[universal-argument] following the digits or minus sign ends the argument.
823 \\[universal-argument] without digits or minus sign provides 4 as argument.
824 Repeating \\[universal-argument] without digits or minus sign
825 multiplies the argument by 4 each time."
829 ;; (describe-arg (list factor) 1)
830 (setq key (read-key-sequence nil t))
831 (while (equal (key-binding key) 'universal-argument)
832 (setq factor (* 4 factor))
833 ;; (describe-arg (list factor) 1)
834 (setq key (read-key-sequence nil t)))
835 (prefix-arg-internal key factor nil)))
837 (defun prefix-arg-internal (key factor value)
839 (if (and (numberp value) (< value 0))
840 (setq sign -1 value (- value)))
842 (setq sign -1 value nil))
843 ;; (describe-arg value sign)
844 (while (equal key "-")
845 (setq sign (- sign) factor nil)
846 ;; (describe-arg value sign)
847 (setq key (read-key-sequence nil t)))
848 (while (and (stringp key)
850 (not (string< key "0"))
851 (not (string< "9" key)))
852 (setq value (+ (* (if (numberp value) value 0) 10)
855 ;; (describe-arg value sign)
856 (setq key (read-key-sequence nil t)))
858 (cond (factor (list factor))
859 ((numberp value) (* value sign))
861 ;; Calling universal-argument after digits
862 ;; terminates the argument but is ignored.
863 (if (eq (key-binding key) 'universal-argument)
865 (describe-arg value sign)
866 (setq key (read-key-sequence nil t))))
867 (setq unread-command-events (listify-key-sequence key))))
869 (defun describe-arg (value sign)
870 (cond ((numberp value)
871 (message "Arg: %d" (* value sign)))
873 (message "Arg: [%d]" (car value)))
875 (message "Arg: -"))))
877 (defun digit-argument (arg)
878 "Part of the numeric argument for the next command.
879 \\[universal-argument] following digits or minus sign ends the argument."
881 (prefix-arg-internal (char-to-string (logand last-command-char ?\177))
884 (defun negative-argument (arg)
885 "Begin a negative numeric argument for the next command.
886 \\[universal-argument] following digits or minus sign ends the argument."
888 (prefix-arg-internal "-" nil arg))
890 (defun forward-to-indentation (arg)
891 "Move forward ARG lines and position at first nonblank character."
894 (skip-chars-forward " \t"))
896 (defun backward-to-indentation (arg)
897 "Move backward ARG lines and position at first nonblank character."
899 (forward-line (- arg))
900 (skip-chars-forward " \t"))
902 (defvar kill-whole-line nil
903 "*If non-nil, `kill-line' with no arg at beg of line kills the whole line.")
905 (defun kill-line (&optional arg)
906 "Kill the rest of the current line; if no nonblanks there, kill thru newline.
907 With prefix argument, kill that many lines from point.
908 Negative arguments kill lines backward.
910 When calling from a program, nil means \"no arg\",
911 a number counts as a prefix arg.
913 If `kill-whole-line' is non-nil, then kill the whole line
914 when given no argument at the beginning of a line."
917 ;; Don't shift point before doing the delete; that way,
918 ;; undo will record the right position of point.
921 (forward-line (prefix-numeric-value arg))
923 (signal 'end-of-buffer nil))
924 (if (or (looking-at "[ \t]*$") (and kill-whole-line (bolp)))
929 ;;;; Window system cut and paste hooks.
931 (defvar interprogram-cut-function nil
932 "Function to call to make a killed region available to other programs.
934 Most window systems provide some sort of facility for cutting and
935 pasting text between the windows of different programs.
936 This variable holds a function that Emacs calls whenever text
937 is put in the kill ring, to make the new kill available to other
940 The function takes one or two arguments.
941 The first argument, TEXT, is a string containing
942 the text which should be made available.
943 The second, PUSH, if non-nil means this is a \"new\" kill;
944 nil means appending to an \"old\" kill.")
946 (defvar interprogram-paste-function nil
947 "Function to call to get text cut from other programs.
949 Most window systems provide some sort of facility for cutting and
950 pasting text between the windows of different programs.
951 This variable holds a function that Emacs calls to obtain
952 text that other programs have provided for pasting.
954 The function should be called with no arguments. If the function
955 returns nil, then no other program has provided such text, and the top
956 of the Emacs kill ring should be used. If the function returns a
957 string, that string should be put in the kill ring as the latest kill.
959 Note that the function should return a string only if a program other
960 than Emacs has provided a string for pasting; if Emacs provided the
961 most recent string, the function should return nil. If it is
962 difficult to tell whether Emacs or some other program provided the
963 current string, it is probably good enough to return nil if the string
964 is equal (according to `string=') to the last text Emacs provided.")
968 ;;;; The kill ring data structure.
970 (defvar kill-ring nil
971 "List of killed text sequences.
972 Since the kill ring is supposed to interact nicely with cut-and-paste
973 facilities offered by window systems, use of this variable should
974 interact nicely with `interprogram-cut-function' and
975 `interprogram-paste-function'. The functions `kill-new',
976 `kill-append', and `current-kill' are supposed to implement this
977 interaction; you may want to use them instead of manipulating the kill
980 (defconst kill-ring-max 30
981 "*Maximum length of kill ring before oldest elements are thrown away.")
983 (defvar kill-ring-yank-pointer nil
984 "The tail of the kill ring whose car is the last thing yanked.")
986 (defun kill-new (string)
987 "Make STRING the latest kill in the kill ring.
988 Set the kill-ring-yank pointer to point to it.
989 If `interprogram-cut-function' is non-nil, apply it to STRING."
990 (setq kill-ring (cons string kill-ring))
991 (if (> (length kill-ring) kill-ring-max)
992 (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil))
993 (setq kill-ring-yank-pointer kill-ring)
994 (if interprogram-cut-function
995 (funcall interprogram-cut-function string t)))
997 (defun kill-append (string before-p)
998 "Append STRING to the end of the latest kill in the kill ring.
999 If BEFORE-P is non-nil, prepend STRING to the kill.
1000 If `interprogram-cut-function' is set, pass the resulting kill to
1004 (concat string (car kill-ring))
1005 (concat (car kill-ring) string)))
1006 (if interprogram-cut-function
1007 (funcall interprogram-cut-function (car kill-ring))))
1009 (defun current-kill (n &optional do-not-move)
1010 "Rotate the yanking point by N places, and then return that kill.
1011 If N is zero, `interprogram-paste-function' is set, and calling it
1012 returns a string, then that string is added to the front of the
1013 kill ring and returned as the latest kill.
1014 If optional arg DO-NOT-MOVE is non-nil, then don't actually move the
1015 yanking point; just return the Nth kill forward."
1016 (let ((interprogram-paste (and (= n 0)
1017 interprogram-paste-function
1018 (funcall interprogram-paste-function))))
1019 (if interprogram-paste
1021 ;; Disable the interprogram cut function when we add the new
1022 ;; text to the kill ring, so Emacs doesn't try to own the
1023 ;; selection, with identical text.
1024 (let ((interprogram-cut-function nil))
1025 (kill-new interprogram-paste))
1027 (or kill-ring (error "Kill ring is empty"))
1028 (let ((ARGth-kill-element
1029 (nthcdr (mod (- n (length kill-ring-yank-pointer))
1033 (setq kill-ring-yank-pointer ARGth-kill-element))
1034 (car ARGth-kill-element)))))
1038 ;;;; Commands for manipulating the kill ring.
1040 (defun kill-region (beg end)
1041 "Kill between point and mark.
1042 The text is deleted but saved in the kill ring.
1043 The command \\[yank] can retrieve it from there.
1044 \(If you want to kill and then yank immediately, use \\[copy-region-as-kill].)
1045 If the buffer is read-only, Emacs will beep and refrain from deleting
1046 the text, but put the text in the kill ring anyway. This means that
1047 you can use the killing commands to copy text from a read-only buffer.
1049 This is the primitive for programs to kill text (as opposed to deleting it).
1050 Supply two arguments, character numbers indicating the stretch of text
1052 Any command that calls this function is a \"kill command\".
1053 If the previous command was also a kill command,
1054 the text killed this time appends to the text killed last time
1055 to make one entry in the kill ring."
1059 ;; If the buffer is read-only, we should beep, in case the person
1060 ;; just isn't aware of this. However, there's no harm in putting
1061 ;; the region's text in the kill ring, anyway.
1062 ((and buffer-read-only (not inhibit-read-only))
1063 (copy-region-as-kill beg end)
1064 ;; This should always barf, and give us the correct error.
1065 (barf-if-buffer-read-only))
1067 ;; In certain cases, we can arrange for the undo list and the kill
1068 ;; ring to share the same string object. This code does that.
1069 ((not (or (eq buffer-undo-list t)
1070 (eq last-command 'kill-region)
1072 ;; Don't let the undo list be truncated before we can even access it.
1073 (let ((undo-strong-limit (+ (- (max beg end) (min beg end)) 100))
1074 (old-list buffer-undo-list)
1076 (delete-region beg end)
1077 ;; Search back in buffer-undo-list for this string,
1078 ;; in case a change hook made property changes.
1079 (setq tail buffer-undo-list)
1080 (while (not (stringp (car (car tail))))
1081 (setq tail (cdr tail)))
1082 ;; Take the same string recorded for undo
1083 ;; and put it in the kill-ring.
1084 (kill-new (car (car tail)))
1085 (setq this-command 'kill-region)))
1088 (copy-region-as-kill beg end)
1089 (delete-region beg end))))
1091 (defun copy-region-as-kill (beg end)
1092 "Save the region as if killed, but don't kill it.
1093 If `interprogram-cut-function' is non-nil, also save the text for a window
1094 system cut and paste."
1096 (if (eq last-command 'kill-region)
1097 (kill-append (buffer-substring beg end) (< end beg))
1098 (kill-new (buffer-substring beg end)))
1099 (setq this-command 'kill-region)
1102 (defun kill-ring-save (beg end)
1103 "Save the region as if killed, but don't kill it.
1104 This command is similar to `copy-region-as-kill', except that it gives
1105 visual feedback indicating the extent of the region being copied.
1106 If `interprogram-cut-function' is non-nil, also save the text for a window
1107 system cut and paste."
1109 (copy-region-as-kill beg end)
1111 (let ((other-end (if (= (point) beg) end beg))
1113 ;; Inhibit quitting so we can make a quit here
1114 ;; look like a C-g typed as a command.
1116 (if (pos-visible-in-window-p other-end (selected-window))
1118 ;; Swap point and mark.
1119 (set-marker (mark-marker) (point) (current-buffer))
1120 (goto-char other-end)
1123 (set-marker (mark-marker) other-end (current-buffer))
1125 ;; If user quit, deactivate the mark
1126 ;; as C-g would as a command.
1127 (and quit-flag mark-active
1129 (let* ((killed-text (current-kill 0))
1130 (message-len (min (length killed-text) 40)))
1132 ;; Don't say "killed"; that is misleading.
1133 (message "Saved text until \"%s\""
1134 (substring killed-text (- message-len)))
1135 (message "Saved text from \"%s\""
1136 (substring killed-text 0 message-len))))))))
1138 (defun append-next-kill ()
1139 "Cause following command, if it kills, to append to previous kill."
1143 (setq this-command 'kill-region)
1144 (message "If the next command is a kill, it will append"))
1145 (setq last-command 'kill-region)))
1147 (defun yank-pop (arg)
1148 "Replace just-yanked stretch of killed text with a different stretch.
1149 This command is allowed only immediately after a `yank' or a `yank-pop'.
1150 At such a time, the region contains a stretch of reinserted
1151 previously-killed text. `yank-pop' deletes that text and inserts in its
1152 place a different stretch of killed text.
1154 With no argument, the previous kill is inserted.
1155 With argument N, insert the Nth previous kill.
1156 If N is negative, this is a more recent kill.
1158 The sequence of kills wraps around, so that after the oldest one
1159 comes the newest one."
1161 (if (not (eq last-command 'yank))
1162 (error "Previous command was not a yank"))
1163 (setq this-command 'yank)
1164 (let ((before (< (point) (mark t))))
1165 (delete-region (point) (mark t))
1166 (set-marker (mark-marker) (point) (current-buffer))
1167 (insert (current-kill arg))
1169 ;; This is like exchange-point-and-mark, but doesn't activate the mark.
1170 ;; It is cleaner to avoid activation, even though the command
1171 ;; loop would deactivate the mark because we inserted text.
1172 (goto-char (prog1 (mark t)
1173 (set-marker (mark-marker) (point) (current-buffer))))))
1176 (defun yank (&optional arg)
1177 "Reinsert the last stretch of killed text.
1178 More precisely, reinsert the stretch of killed text most recently
1179 killed OR yanked. Put point at end, and set mark at beginning.
1180 With just C-u as argument, same but put point at beginning (and mark at end).
1181 With argument N, reinsert the Nth most recently killed stretch of killed
1183 See also the command \\[yank-pop]."
1185 ;; If we don't get all the way thru, make last-command indicate that
1186 ;; for the following command.
1187 (setq this-command t)
1189 (insert (current-kill (cond
1194 ;; This is like exchange-point-and-mark, but doesn't activate the mark.
1195 ;; It is cleaner to avoid activation, even though the command
1196 ;; loop would deactivate the mark because we inserted text.
1197 (goto-char (prog1 (mark t)
1198 (set-marker (mark-marker) (point) (current-buffer)))))
1199 ;; If we do get all the way thru, make this-command indicate that.
1200 (setq this-command 'yank)
1203 (defun rotate-yank-pointer (arg)
1204 "Rotate the yanking point in the kill ring.
1205 With argument, rotate that many kills forward (or backward, if negative)."
1210 (defun insert-buffer (buffer)
1211 "Insert after point the contents of BUFFER.
1212 Puts mark after the inserted text.
1213 BUFFER may be a buffer or a buffer name."
1214 (interactive (list (progn (barf-if-buffer-read-only)
1215 (read-buffer "Insert buffer: " (other-buffer) t))))
1216 (or (bufferp buffer)
1217 (setq buffer (get-buffer buffer)))
1218 (let (start end newmark)
1222 (setq start (point-min) end (point-max)))
1223 (insert-buffer-substring buffer start end)
1224 (setq newmark (point)))
1225 (push-mark newmark))
1228 (defun append-to-buffer (buffer start end)
1229 "Append to specified buffer the text of the region.
1230 It is inserted into that buffer before its point.
1232 When calling from a program, give three arguments:
1233 BUFFER (or buffer name), START and END.
1234 START and END specify the portion of the current buffer to be copied."
1236 (list (read-buffer "Append to buffer: " (other-buffer nil t))
1237 (region-beginning) (region-end)))
1238 (let ((oldbuf (current-buffer)))
1240 (set-buffer (get-buffer-create buffer))
1241 (insert-buffer-substring oldbuf start end))))
1243 (defun prepend-to-buffer (buffer start end)
1244 "Prepend to specified buffer the text of the region.
1245 It is inserted into that buffer after its point.
1247 When calling from a program, give three arguments:
1248 BUFFER (or buffer name), START and END.
1249 START and END specify the portion of the current buffer to be copied."
1250 (interactive "BPrepend to buffer: \nr")
1251 (let ((oldbuf (current-buffer)))
1253 (set-buffer (get-buffer-create buffer))
1255 (insert-buffer-substring oldbuf start end)))))
1257 (defun copy-to-buffer (buffer start end)
1258 "Copy to specified buffer the text of the region.
1259 It is inserted into that buffer, replacing existing text there.
1261 When calling from a program, give three arguments:
1262 BUFFER (or buffer name), START and END.
1263 START and END specify the portion of the current buffer to be copied."
1264 (interactive "BCopy to buffer: \nr")
1265 (let ((oldbuf (current-buffer)))
1267 (set-buffer (get-buffer-create buffer))
1270 (insert-buffer-substring oldbuf start end)))))
1272 (defvar mark-even-if-inactive nil
1273 "*Non-nil means you can use the mark even when inactive.
1274 This option makes a difference in Transient Mark mode.
1275 When the option is non-nil, deactivation of the mark
1276 turns off region highlighting, but commands that use the mark
1277 behave as if the mark were still active.")
1279 (put 'mark-inactive 'error-conditions '(mark-inactive error))
1280 (put 'mark-inactive 'error-message "The mark is not active now")
1282 (defun mark (&optional force)
1283 "Return this buffer's mark value as integer; error if mark inactive.
1284 If optional argument FORCE is non-nil, access the mark value
1285 even if the mark is not currently active, and return nil
1286 if there is no mark at all.
1288 If you are using this in an editing command, you are most likely making
1289 a mistake; see the documentation of `set-mark'."
1290 (if (or force mark-active mark-even-if-inactive)
1291 (marker-position (mark-marker))
1292 (signal 'mark-inactive nil)))
1294 ;; Many places set mark-active directly, and several of them failed to also
1295 ;; run deactivate-mark-hook. This shorthand should simplify.
1296 (defsubst deactivate-mark ()
1297 "Deactivate the mark by setting `mark-active' to nil.
1298 \(That makes a difference only in Transient Mark mode.)
1299 Also runs the hook `deactivate-mark-hook'."
1300 (setq mark-active nil)
1301 (run-hooks 'deactivate-mark-hook))
1303 (defun set-mark (pos)
1304 "Set this buffer's mark to POS. Don't use this function!
1305 That is to say, don't use this function unless you want
1306 the user to see that the mark has moved, and you want the previous
1307 mark position to be lost.
1309 Normally, when a new mark is set, the old one should go on the stack.
1310 This is why most applications should use push-mark, not set-mark.
1312 Novice Emacs Lisp programmers often try to use the mark for the wrong
1313 purposes. The mark saves a location for the user's convenience.
1314 Most editing commands should not alter the mark.
1315 To remember a location for internal use in the Lisp program,
1316 store it in a Lisp variable. Example:
1318 (let ((beg (point))) (forward-line 1) (delete-region beg (point)))."
1322 (setq mark-active t)
1323 (run-hooks 'activate-mark-hook)
1324 (set-marker (mark-marker) pos (current-buffer)))
1326 (set-marker (mark-marker) pos (current-buffer))))
1328 (defvar mark-ring nil
1329 "The list of saved former marks of the current buffer,
1330 most recent first.")
1331 (make-variable-buffer-local 'mark-ring)
1333 (defconst mark-ring-max 16
1334 "*Maximum size of mark ring. Start discarding off end if gets this big.")
1336 (defvar global-mark-ring nil
1337 "The list of saved global marks, most recent first.")
1339 (defconst global-mark-ring-max 16
1340 "*Maximum size of global mark ring. \
1341 Start discarding off end if gets this big.")
1343 (defun set-mark-command (arg)
1344 "Set mark at where point is, or jump to mark.
1345 With no prefix argument, set mark, push old mark position on local mark
1346 ring, and push mark on global mark ring.
1347 With argument, jump to mark, and pop a new position for mark off the ring
1348 \(does not affect global mark ring\).
1350 Novice Emacs Lisp programmers often try to use the mark for the wrong
1351 purposes. See the documentation of `set-mark' for more information."
1355 (push-mark nil nil t))
1357 (error "No mark set in this buffer")
1358 (goto-char (mark t))
1361 (defun push-mark (&optional location nomsg activate)
1362 "Set mark at LOCATION (point, by default) and push old mark on mark ring.
1363 If the last global mark pushed was not in the current buffer,
1364 also push LOCATION on the global mark ring.
1365 Display `Mark set' unless the optional second arg NOMSG is non-nil.
1366 In Transient Mark mode, activate mark if optional third arg ACTIVATE non-nil.
1368 Novice Emacs Lisp programmers often try to use the mark for the wrong
1369 purposes. See the documentation of `set-mark' for more information.
1371 In Transient Mark mode, this does not activate the mark."
1374 (setq mark-ring (cons (copy-marker (mark-marker)) mark-ring))
1375 (if (> (length mark-ring) mark-ring-max)
1377 (move-marker (car (nthcdr mark-ring-max mark-ring)) nil)
1378 (setcdr (nthcdr (1- mark-ring-max) mark-ring) nil))))
1379 (set-marker (mark-marker) (or location (point)) (current-buffer))
1380 ;; Now push the mark on the global mark ring.
1381 (if (and global-mark-ring
1382 (eq (marker-buffer (car global-mark-ring)) (current-buffer)))
1383 ;; The last global mark pushed was in this same buffer.
1384 ;; Don't push another one.
1386 (setq global-mark-ring (cons (copy-marker (mark-marker)) global-mark-ring))
1387 (if (> (length global-mark-ring) global-mark-ring-max)
1389 (move-marker (car (nthcdr global-mark-ring-max global-mark-ring))
1391 (setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil))))
1392 (or nomsg executing-macro (> (minibuffer-depth) 0)
1393 (message "Mark set"))
1394 (if (or activate (not transient-mark-mode))
1395 (set-mark (mark t)))
1399 "Pop off mark ring into the buffer's actual mark.
1400 Does not set point. Does nothing if mark ring is empty."
1403 (setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker)))))
1404 (set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer))
1406 (move-marker (car mark-ring) nil)
1407 (if (null (mark t)) (ding))
1408 (setq mark-ring (cdr mark-ring)))))
1410 (define-function 'exchange-dot-and-mark 'exchange-point-and-mark)
1411 (defun exchange-point-and-mark ()
1412 "Put the mark where point is now, and point where the mark is now.
1413 This command works even when the mark is not active,
1414 and it reactivates the mark."
1416 (let ((omark (mark t)))
1418 (error "No mark set in this buffer"))
1423 (defun transient-mark-mode (arg)
1424 "Toggle Transient Mark mode.
1425 With arg, turn Transient Mark mode on if arg is positive, off otherwise.
1427 In Transient Mark mode, when the mark is active, the region is highlighted.
1428 Changing the buffer \"deactivates\" the mark.
1429 So do certain other operations that set the mark
1430 but whose main purpose is something else--for example,
1431 incremental search, \\[beginning-of-buffer], and \\[end-of-buffer]."
1433 (setq transient-mark-mode
1435 (not transient-mark-mode)
1436 (> (prefix-numeric-value arg) 0))))
1438 (defun pop-global-mark ()
1439 "Pop off global mark ring and jump to the top location."
1441 (or global-mark-ring
1442 (error "No global mark set"))
1443 (let* ((marker (car global-mark-ring))
1444 (buffer (marker-buffer marker))
1445 (position (marker-position marker)))
1446 (setq global-mark-ring (cdr global-mark-ring))
1448 (or (and (>= position (point-min))
1449 (<= position (point-max)))
1451 (goto-char position)
1452 (switch-to-buffer buffer)))
1454 (defvar next-line-add-newlines t
1455 "*If non-nil, `next-line' inserts newline to avoid `end of buffer' error.")
1457 (defun next-line (arg)
1458 "Move cursor vertically down ARG lines.
1459 If there is no character in the target line exactly under the current column,
1460 the cursor is positioned after the character in that line which spans this
1461 column, or at the end of the line if it is not long enough.
1462 If there is no line in the buffer after this one, behavior depends on the
1463 value of next-line-add-newlines. If non-nil, a newline character is inserted
1464 to create a line and the cursor moves to that line, otherwise the cursor is
1465 moved to the end of the buffer (if already at the end of the buffer, an error
1468 The command \\[set-goal-column] can be used to create
1469 a semipermanent goal column to which this command always moves.
1470 Then it does not try to move vertically. This goal column is stored
1471 in `goal-column', which is nil when there is none.
1473 If you are thinking of using this in a Lisp program, consider
1474 using `forward-line' instead. It is usually easier to use
1475 and more reliable (no dependence on goal column, etc.)."
1477 (if (and next-line-add-newlines (= arg 1))
1478 (let ((opoint (point)))
1480 (if (or (= opoint (point)) (not (eq (preceding-char) ?\n)))
1487 (defun previous-line (arg)
1488 "Move cursor vertically up ARG lines.
1489 If there is no character in the target line exactly over the current column,
1490 the cursor is positioned after the character in that line which spans this
1491 column, or at the end of the line if it is not long enough.
1493 The command \\[set-goal-column] can be used to create
1494 a semipermanent goal column to which this command always moves.
1495 Then it does not try to move vertically.
1497 If you are thinking of using this in a Lisp program, consider using
1498 `forward-line' with a negative argument instead. It is usually easier
1499 to use and more reliable (no dependence on goal column, etc.)."
1504 (defconst track-eol nil
1505 "*Non-nil means vertical motion starting at end of line keeps to ends of lines.
1506 This means moving to the end of each line moved onto.
1507 The beginning of a blank line does not count as the end of a line.")
1509 (defvar goal-column nil
1510 "*Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil.")
1511 (make-variable-buffer-local 'goal-column)
1513 (defvar temporary-goal-column 0
1514 "Current goal column for vertical motion.
1515 It is the column where point was
1516 at the start of current run of vertical motion commands.
1517 When the `track-eol' feature is doing its job, the value is 9999.")
1519 (defun line-move (arg)
1522 (if (not (or (eq last-command 'next-line)
1523 (eq last-command 'previous-line)))
1524 (setq temporary-goal-column
1525 (if (and track-eol (eolp)
1526 ;; Don't count beg of empty line as end of line
1527 ;; unless we just did explicit end-of-line.
1528 (or (not (bolp)) (eq last-command 'end-of-line)))
1531 (if (not (integerp selective-display))
1532 (or (and (zerop (forward-line arg))
1534 (throw 'exit (if (bobp)
1535 'beginning-of-buffer
1537 ;; Move by arg lines, but ignore invisible ones.
1540 (and (zerop (vertical-motion 1))
1541 (throw 'exit 'end-of-buffer))
1542 (setq arg (1- arg)))
1545 (and (zerop (vertical-motion -1))
1546 (throw 'exit 'beginning-of-buffer))
1547 (setq arg (1+ arg))))
1548 (move-to-column (or goal-column temporary-goal-column))
1551 ((eq signal 'beginning-of-buffer)
1552 (message "Beginning of buffer")
1554 ((eq signal 'end-of-buffer)
1555 (message "End of buffer")
1558 ;;; Many people have said they rarely use this feature, and often type
1559 ;;; it by accident. Maybe it shouldn't even be on a key.
1560 (put 'set-goal-column 'disabled t)
1562 (defun set-goal-column (arg)
1563 "Set the current horizontal position as a goal for \\[next-line] and \\[previous-line].
1564 Those commands will move to this position in the line moved to
1565 rather than trying to keep the same horizontal position.
1566 With a non-nil argument, clears out the goal column
1567 so that \\[next-line] and \\[previous-line] resume vertical motion.
1568 The goal column is stored in the variable `goal-column'."
1572 (setq goal-column nil)
1573 (message "No goal column"))
1574 (setq goal-column (current-column))
1575 (message (substitute-command-keys
1576 "Goal column %d (use \\[set-goal-column] with an arg to unset it)")
1580 ;;; Partial support for horizontal autoscrolling. Someday, this feature
1581 ;;; will be built into the C level and all the (hscroll-point-visible) calls
1584 (defvar hscroll-step 0
1585 "*The number of columns to try scrolling a window by when point moves out.
1586 If that fails to bring point back on frame, point is centered instead.
1587 If this is zero, point is always centered after it moves off frame.")
1589 (defun hscroll-point-visible ()
1590 "Scrolls the selected window horizontally to make point visible."
1592 (set-buffer (window-buffer))
1593 (if (not (or truncate-lines
1594 (> (window-hscroll) 0)
1595 (and truncate-partial-width-windows
1596 (< (window-width) (frame-width)))))
1597 ;; Point is always visible when lines are wrapped.
1599 ;; If point is on the invisible part of the line before window-start,
1600 ;; then hscrolling can't bring it back, so reset window-start first.
1601 (and (< (point) (window-start))
1602 (let ((ws-bol (save-excursion
1603 (goto-char (window-start))
1606 (and (>= (point) ws-bol)
1607 (set-window-start nil ws-bol))))
1608 (let* ((here (hscroll-window-column))
1609 (left (min (window-hscroll) 1))
1610 (right (1- (window-width))))
1611 ;; Allow for the truncation glyph, if we're not exactly at eol.
1612 (if (not (and (= here right)
1613 (= (following-char) ?\n)))
1614 (setq right (1- right)))
1616 ;; If too far away, just recenter. But don't show too much
1617 ;; white space off the end of the line.
1618 ((or (< here (- left hscroll-step))
1619 (> here (+ right hscroll-step)))
1620 (let ((eol (save-excursion (end-of-line) (hscroll-window-column))))
1621 (scroll-left (min (- here (/ (window-width) 2))
1622 (- eol (window-width) -5)))))
1623 ;; Within range. Scroll by one step (or maybe not at all).
1625 (scroll-right hscroll-step))
1627 (scroll-left hscroll-step)))))))
1629 ;; This function returns the window's idea of the display column of point,
1630 ;; assuming that the window is already known to be truncated rather than
1631 ;; wrapped, and that we've already handled the case where point is on the
1632 ;; part of the line before window-start. We ignore window-width; if point
1633 ;; is beyond the right margin, we want to know how far. The return value
1634 ;; includes the effects of window-hscroll, window-start, and the prompt
1635 ;; string in the minibuffer. It may be negative due to hscroll.
1636 (defun hscroll-window-column ()
1637 (let* ((hscroll (window-hscroll))
1638 (startpos (save-excursion
1640 (if (= (point) (save-excursion
1641 (goto-char (window-start))
1644 (goto-char (window-start)))
1646 (hpos (+ (if (and (eq (selected-window) (minibuffer-window))
1647 (= 1 (window-start))
1648 (= startpos (point-min)))
1649 (minibuffer-prompt-width)
1651 (min 0 (- 1 hscroll))))
1653 (car (cdr (compute-motion startpos (cons hpos 0)
1655 1000000 (cons hscroll 0) nil)))))
1658 ;; rms: (1) The definitions of arrow keys should not simply restate
1659 ;; what keys they are. The arrow keys should run the ordinary commands.
1660 ;; (2) The arrow keys are just one of many common ways of moving point
1661 ;; within a line. Real horizontal autoscrolling would be a good feature,
1662 ;; but supporting it only for arrow keys is too incomplete to be desirable.
1664 ;;;;; Make arrow keys do the right thing for improved terminal support
1665 ;;;;; When we implement true horizontal autoscrolling, right-arrow and
1666 ;;;;; left-arrow can lose the (if truncate-lines ...) clause and become
1667 ;;;;; aliases. These functions are bound to the corresponding keyboard
1668 ;;;;; events in loaddefs.el.
1670 ;;(defun right-arrow (arg)
1671 ;; "Move right one character on the screen (with prefix ARG, that many chars).
1672 ;;Scroll right if needed to keep point horizontally onscreen."
1673 ;; (interactive "P")
1674 ;; (forward-char arg)
1675 ;; (hscroll-point-visible))
1677 ;;(defun left-arrow (arg)
1678 ;; "Move left one character on the screen (with prefix ARG, that many chars).
1679 ;;Scroll left if needed to keep point horizontally onscreen."
1680 ;; (interactive "P")
1681 ;; (backward-char arg)
1682 ;; (hscroll-point-visible))
1684 (defun transpose-chars (arg)
1685 "Interchange characters around point, moving forward one character.
1686 With prefix arg ARG, effect is to take character before point
1687 and drag it forward past ARG other characters (backward if ARG negative).
1688 If no argument and at end of line, the previous two chars are exchanged."
1690 (and (null arg) (eolp) (forward-char -1))
1691 (transpose-subr 'forward-char (prefix-numeric-value arg)))
1693 (defun transpose-words (arg)
1694 "Interchange words around point, leaving point at end of them.
1695 With prefix arg ARG, effect is to take word before or around point
1696 and drag it forward past ARG other words (backward if ARG negative).
1697 If ARG is zero, the words around or after point and around or after mark
1700 (transpose-subr 'forward-word arg))
1702 (defun transpose-sexps (arg)
1703 "Like \\[transpose-words] but applies to sexps.
1704 Does not work on a sexp that point is in the middle of
1705 if it is a list or string."
1707 (transpose-subr 'forward-sexp arg))
1709 (defun transpose-lines (arg)
1710 "Exchange current line and previous line, leaving point after both.
1711 With argument ARG, takes previous line and moves it past ARG lines.
1712 With argument 0, interchanges line point is in with line mark is in."
1714 (transpose-subr (function
1718 ;; Move forward over a line,
1719 ;; but create a newline if none exists yet.
1724 (forward-line arg))))
1727 (defun transpose-subr (mover arg)
1728 (let (start1 end1 start2 end2)
1735 (setq start2 (point))
1740 (setq start1 (point))
1742 (exchange-point-and-mark)))
1745 (setq start1 (point))
1751 (setq start2 (point))
1754 (setq arg (1- arg)))
1757 (setq start2 (point))
1759 (setq start1 (point))
1765 (setq arg (1+ arg)))))
1767 (defun transpose-subr-1 ()
1768 (if (> (min end1 end2) (max start1 start2))
1769 (error "Don't have two things to transpose"))
1770 (let ((word1 (buffer-substring start1 end1))
1771 (word2 (buffer-substring start2 end2)))
1772 (delete-region start2 end2)
1775 (goto-char (if (< start1 start2) start1
1776 (+ start1 (- (length word1) (length word2)))))
1777 (delete-char (length word1))
1780 (defconst comment-column 32
1781 "*Column to indent right-margin comments to.
1782 Setting this variable automatically makes it local to the current buffer.
1783 Each mode establishes a different default value for this variable; you
1784 can set the value for a particular mode using that mode's hook.")
1785 (make-variable-buffer-local 'comment-column)
1787 (defconst comment-start nil
1788 "*String to insert to start a new comment, or nil if no comment syntax defined.")
1790 (defconst comment-start-skip nil
1791 "*Regexp to match the start of a comment plus everything up to its body.
1792 If there are any \\(...\\) pairs, the comment delimiter text is held to begin
1793 at the place matched by the close of the first pair.")
1795 (defconst comment-end ""
1796 "*String to insert to end a new comment.
1797 Should be an empty string if comments are terminated by end-of-line.")
1799 (defconst comment-indent-hook nil
1800 "Obsolete variable for function to compute desired indentation for a comment.
1801 This function is called with no args with point at the beginning of
1802 the comment's starting delimiter.")
1804 (defconst comment-indent-function
1805 '(lambda () comment-column)
1806 "Function to compute desired indentation for a comment.
1807 This function is called with no args with point at the beginning of
1808 the comment's starting delimiter.")
1810 (defun indent-for-comment ()
1811 "Indent this line's comment to comment column, or insert an empty comment."
1813 (beginning-of-line 1)
1814 (if (null comment-start)
1815 (error "No comment syntax defined")
1816 (let* ((eolpos (save-excursion (end-of-line) (point)))
1818 (if (re-search-forward comment-start-skip eolpos 'move)
1819 (progn (setq cpos (point-marker))
1820 ;; Find the start of the comment delimiter.
1821 ;; If there were paren-pairs in comment-start-skip,
1822 ;; position at the end of the first pair.
1824 (goto-char (match-end 1))
1825 ;; If comment-start-skip matched a string with
1826 ;; internal whitespace (not final whitespace) then
1827 ;; the delimiter start at the end of that
1828 ;; whitespace. Otherwise, it starts at the
1829 ;; beginning of what was matched.
1830 (skip-syntax-backward " " (match-beginning 0))
1831 (skip-syntax-backward "^ " (match-beginning 0)))))
1832 (setq begpos (point))
1833 ;; Compute desired indent.
1834 (if (= (current-column)
1835 (setq indent (if comment-indent-hook
1836 (funcall comment-indent-hook)
1837 (funcall comment-indent-function))))
1839 ;; If that's different from current, change it.
1840 (skip-chars-backward " \t")
1841 (delete-region (point) begpos)
1843 ;; An existing comment?
1845 (progn (goto-char cpos)
1846 (set-marker cpos nil))
1848 (insert comment-start)
1850 (insert comment-end))))))
1852 (defun set-comment-column (arg)
1853 "Set the comment column based on point.
1854 With no arg, set the comment column to the current column.
1855 With just minus as arg, kill any comment on this line.
1856 With any other arg, set comment column to indentation of the previous comment
1857 and then align or create a comment on this line at that column."
1865 (re-search-backward comment-start-skip)
1867 (re-search-forward comment-start-skip)
1868 (goto-char (match-beginning 0))
1869 (setq comment-column (current-column))
1870 (message "Comment column set to %d" comment-column))
1871 (indent-for-comment))
1872 (setq comment-column (current-column))
1873 (message "Comment column set to %d" comment-column))))
1875 (defun kill-comment (arg)
1876 "Kill the comment on this line, if any.
1877 With argument, kill comments on that many lines starting with this one."
1878 ;; this function loses in a lot of situations. it incorrectly recognises
1879 ;; comment delimiters sometimes (ergo, inside a string), doesn't work
1880 ;; with multi-line comments, can kill extra whitespace if comment wasn't
1881 ;; through end-of-line, et cetera.
1883 (or comment-start-skip (error "No comment syntax defined"))
1884 (let ((count (prefix-numeric-value arg)) endc)
1890 (and (string< "" comment-end)
1893 (re-search-forward (regexp-quote comment-end) endc 'move)
1894 (skip-chars-forward " \t")
1897 (if (re-search-forward comment-start-skip endc t)
1899 (goto-char (match-beginning 0))
1900 (skip-chars-backward " \t")
1901 (kill-region (point) endc)
1902 ;; to catch comments a line beginnings
1903 (indent-according-to-mode))))
1904 (if arg (forward-line 1))
1905 (setq count (1- count)))))
1907 (defun comment-region (beg end &optional arg)
1908 "Comment or uncomment each line in the region.
1909 With just C-u prefix arg, uncomment each line in region.
1910 Numeric prefix arg ARG means use ARG comment characters.
1911 If ARG is negative, delete that many comment characters instead.
1912 Comments are terminated on each line, even for syntax in which newline does
1913 not end the comment. Blank lines do not get comments."
1914 ;; if someone wants it to only put a comment-start at the beginning and
1915 ;; comment-end at the end then typing it, C-x C-x, closing it, C-x C-x
1916 ;; is easy enough. No option is made here for other than commenting
1918 (interactive "r\nP")
1919 (or comment-start (error "No comment syntax is defined"))
1920 (if (> beg end) (let (mid) (setq mid beg beg end end mid)))
1923 (let ((cs comment-start) (ce comment-end)
1925 (if (consp arg) (setq numarg t)
1926 (setq numarg (prefix-numeric-value arg))
1927 ;; For positive arg > 1, replicate the comment delims now,
1928 ;; then insert the replicated strings just once.
1930 (setq cs (concat cs comment-start)
1931 ce (concat ce comment-end))
1932 (setq numarg (1- numarg))))
1933 ;; Loop over all lines from BEG to END.
1934 (narrow-to-region beg end)
1937 (if (or (eq numarg t) (< numarg 0))
1939 ;; Delete comment start from beginning of line.
1941 (while (looking-at (regexp-quote cs))
1942 (delete-char (length cs)))
1943 (let ((count numarg))
1944 (while (and (> 1 (setq count (1+ count)))
1945 (looking-at (regexp-quote cs)))
1946 (delete-char (length cs)))))
1947 ;; Delete comment end from end of line.
1953 ;; This is questionable if comment-end ends in
1954 ;; whitespace. That is pretty brain-damaged,
1956 (skip-chars-backward " \t")
1957 (if (and (>= (- (point) (point-min)) (length ce))
1959 (backward-char (length ce))
1960 (looking-at (regexp-quote ce))))
1961 (delete-char (- (length ce)))))
1962 (let ((count numarg))
1963 (while (> 1 (setq count (1+ count)))
1965 ;; this is questionable if comment-end ends in whitespace
1966 ;; that is pretty brain-damaged though
1967 (skip-chars-backward " \t")
1969 (backward-char (length ce))
1970 (if (looking-at (regexp-quote ce))
1971 (delete-char (length ce))))))))
1973 ;; Insert at beginning and at end.
1974 (if (looking-at "[ \t]*$") ()
1976 (if (string= "" ce) ()
1979 (search-forward "\n" nil 'move)))))))
1981 (defun backward-word (arg)
1982 "Move backward until encountering the end of a word.
1983 With argument, do this that many times.
1984 In programs, it is faster to call `forward-word' with negative arg."
1986 (forward-word (- arg)))
1988 (defun mark-word (arg)
1989 "Set mark arg words away from point."
1997 (defun kill-word (arg)
1998 "Kill characters forward until encountering the end of a word.
1999 With argument, do this that many times."
2001 (kill-region (point) (save-excursion (forward-word arg) (point))))
2003 (defun backward-kill-word (arg)
2004 "Kill characters backward until encountering the end of a word.
2005 With argument, do this that many times."
2007 (kill-word (- arg)))
2009 (defun current-word (&optional strict)
2010 "Return the word point is on (or a nearby word) as a string.
2011 If optional arg STRICT is non-nil, return nil unless point is within
2012 or adjacent to a word."
2014 (let ((oldpoint (point)) (start (point)) (end (point)))
2015 (skip-syntax-backward "w_") (setq start (point))
2016 (goto-char oldpoint)
2017 (skip-syntax-forward "w_") (setq end (point))
2018 (if (and (eq start oldpoint) (eq end oldpoint))
2019 ;; Point is neither within nor adjacent to a word.
2022 ;; Look for preceding word in same line.
2023 (skip-syntax-backward "^w_"
2024 (save-excursion (beginning-of-line)
2027 ;; No preceding word in same line.
2028 ;; Look for following word in same line.
2030 (skip-syntax-forward "^w_"
2031 (save-excursion (end-of-line)
2033 (setq start (point))
2034 (skip-syntax-forward "w_")
2037 (skip-syntax-backward "w_")
2038 (setq start (point)))
2039 (buffer-substring start end)))
2040 (buffer-substring start end)))))
2042 (defconst fill-prefix nil
2043 "*String for filling to insert at front of new line, or nil for none.
2044 Setting this variable automatically makes it local to the current buffer.")
2045 (make-variable-buffer-local 'fill-prefix)
2047 (defconst auto-fill-inhibit-regexp nil
2048 "*Regexp to match lines which should not be auto-filled.")
2050 (defun do-auto-fill ()
2052 (or (and auto-fill-inhibit-regexp
2053 (save-excursion (beginning-of-line)
2054 (looking-at auto-fill-inhibit-regexp)))
2055 (while (and (not give-up) (> (current-column) fill-column))
2056 ;; Determine where to split the line.
2058 (let ((opoint (point))
2062 (move-to-column (1+ fill-column))
2063 ;; Move back to a word boundary.
2065 ;; If this is after period and a single space,
2066 ;; move back once more--we don't want to break
2067 ;; the line there and make it look like a
2071 sentence-end-double-space
2072 (save-excursion (forward-char -1)
2073 (and (looking-at "\\. ")
2074 (not (looking-at "\\. "))))))
2076 (skip-chars-backward "^ \t\n")
2077 ;; If we find nowhere on the line to break it,
2078 ;; break after one word. Set bounce to t
2079 ;; so we will not keep going in this while loop.
2082 (re-search-forward "[ \t]" opoint t)
2084 (skip-chars-backward " \t"))
2085 ;; Let fill-point be set to the place where we end up.
2087 ;; If that place is not the beginning of the line,
2088 ;; break the line there.
2090 (goto-char fill-point)
2092 (let ((prev-column (current-column)))
2093 ;; If point is at the fill-point, do not `save-excursion'.
2094 ;; Otherwise, if a comment prefix or fill-prefix is inserted,
2095 ;; point will end up before it rather than after it.
2097 (skip-chars-backward " \t")
2098 (= (point) fill-point))
2099 (indent-new-comment-line)
2101 (goto-char fill-point)
2102 (indent-new-comment-line)))
2103 ;; If making the new line didn't reduce the hpos of
2104 ;; the end of the line, then give up now;
2105 ;; trying again will not help.
2106 (if (>= (current-column) prev-column)
2108 ;; No place to break => stop trying.
2109 (setq give-up t)))))))
2111 (defun auto-fill-mode (&optional arg)
2112 "Toggle auto-fill mode.
2113 With arg, turn Auto-Fill mode on if and only if arg is positive.
2114 In Auto-Fill mode, inserting a space at a column beyond `fill-column'
2115 automatically breaks the line at a previous space."
2117 (prog1 (setq auto-fill-function
2119 (not auto-fill-function)
2120 (> (prefix-numeric-value arg) 0))
2124 (set-buffer-modified-p (buffer-modified-p))))
2126 ;; This holds a document string used to document auto-fill-mode.
2127 (defun auto-fill-function ()
2128 "Automatically break line at a previous space, in insertion of text."
2131 (defun turn-on-auto-fill ()
2132 "Unconditionally turn on Auto Fill mode."
2135 (defun set-fill-column (arg)
2136 "Set `fill-column' to current column, or to argument if given.
2137 The variable `fill-column' has a separate value for each buffer."
2139 (setq fill-column (if (integerp arg) arg (current-column)))
2140 (message "fill-column set to %d" fill-column))
2142 (defconst comment-multi-line nil
2143 "*Non-nil means \\[indent-new-comment-line] should continue same comment
2144 on new line, with no new terminator or starter.
2145 This is obsolete because you might as well use \\[newline-and-indent].")
2147 (defun indent-new-comment-line ()
2148 "Break line at point and indent, continuing comment if within one.
2149 This indents the body of the continued comment
2150 under the previous comment line.
2152 This command is intended for styles where you write a comment per line,
2153 starting a new comment (and terminating it if necessary) on each line.
2154 If you want to continue one comment across several lines, use \\[newline-and-indent]."
2156 (let (comcol comstart)
2157 (skip-chars-backward " \t")
2158 (delete-region (point)
2159 (progn (skip-chars-forward " \t")
2162 (if (not comment-multi-line)
2164 (if (and comment-start-skip
2165 (let ((opoint (point)))
2167 (re-search-forward comment-start-skip opoint t)))
2168 ;; The old line is a comment.
2169 ;; Set WIN to the pos of the comment-start.
2170 ;; But if the comment is empty, look at preceding lines
2171 ;; to find one that has a nonempty comment.
2172 (let ((win (match-beginning 0)))
2173 (while (and (eolp) (not (bobp))
2176 (setq opoint (point))
2178 (re-search-forward comment-start-skip opoint t)))
2179 (setq win (match-beginning 0)))
2180 ;; Indent this line like what we found.
2182 (setq comcol (current-column))
2183 (setq comstart (buffer-substring (point) (match-end 0)))))))
2185 (let ((comment-column comcol)
2186 (comment-start comstart)
2187 (comment-end comment-end))
2188 (and comment-end (not (equal comment-end ""))
2189 ; (if (not comment-multi-line)
2192 (insert comment-end)
2194 ; (setq comment-column (+ comment-column (length comment-start))
2199 (setq comment-end ""))
2202 (indent-for-comment)
2204 ;; Make sure we delete the newline inserted above.
2208 (insert fill-prefix)
2209 (indent-according-to-mode)))))
2211 (defun set-selective-display (arg)
2212 "Set `selective-display' to ARG; clear it if no arg.
2213 When the value of `selective-display' is a number > 0,
2214 lines whose indentation is >= that value are not displayed.
2215 The variable `selective-display' has a separate value for each buffer."
2217 (if (eq selective-display t)
2218 (error "selective-display already in use for marked lines"))
2221 (narrow-to-region (point-min) (point))
2222 (goto-char (window-start))
2223 (vertical-motion (window-height)))))
2224 (setq selective-display
2225 (and arg (prefix-numeric-value arg)))
2226 (recenter current-vpos))
2227 (set-window-start (selected-window) (window-start (selected-window)))
2228 (princ "selective-display set to " t)
2229 (prin1 selective-display t)
2232 (defconst overwrite-mode-textual " Ovwrt"
2233 "The string displayed in the mode line when in overwrite mode.")
2234 (defconst overwrite-mode-binary " Bin Ovwrt"
2235 "The string displayed in the mode line when in binary overwrite mode.")
2237 (defun overwrite-mode (arg)
2238 "Toggle overwrite mode.
2239 With arg, turn overwrite mode on iff arg is positive.
2240 In overwrite mode, printing characters typed in replace existing text
2241 on a one-for-one basis, rather than pushing it to the right. At the
2242 end of a line, such characters extend the line. Before a tab,
2243 such characters insert until the tab is filled in.
2244 \\[quoted-insert] still inserts characters in overwrite mode; this
2245 is supposed to make it easier to insert characters when necessary."
2247 (setq overwrite-mode
2248 (if (if (null arg) (not overwrite-mode)
2249 (> (prefix-numeric-value arg) 0))
2250 'overwrite-mode-textual))
2251 (force-mode-line-update))
2253 (defun binary-overwrite-mode (arg)
2254 "Toggle binary overwrite mode.
2255 With arg, turn binary overwrite mode on iff arg is positive.
2256 In binary overwrite mode, printing characters typed in replace
2257 existing text. Newlines are not treated specially, so typing at the
2258 end of a line joins the line to the next, with the typed character
2259 between them. Typing before a tab character simply replaces the tab
2260 with the character typed.
2261 \\[quoted-insert] replaces the text at the cursor, just as ordinary
2262 typing characters do.
2264 Note that binary overwrite mode is not its own minor mode; it is a
2265 specialization of overwrite-mode, entered by setting the
2266 `overwrite-mode' variable to `overwrite-mode-binary'."
2268 (setq overwrite-mode
2270 (not (eq overwrite-mode 'overwrite-mode-binary))
2271 (> (prefix-numeric-value arg) 0))
2272 'overwrite-mode-binary))
2273 (force-mode-line-update))
2275 (defvar line-number-mode nil
2276 "*Non-nil means display line number in mode line.")
2278 (defun line-number-mode (arg)
2279 "Toggle Line Number mode.
2280 With arg, turn Line Number mode on iff arg is positive.
2281 When Line Number mode is enabled, the line number appears
2284 (setq line-number-mode
2285 (if (null arg) (not line-number-mode)
2286 (> (prefix-numeric-value arg) 0)))
2287 (force-mode-line-update))
2289 (defvar blink-matching-paren t
2290 "*Non-nil means show matching open-paren when close-paren is inserted.")
2292 (defconst blink-matching-paren-distance 12000
2293 "*If non-nil, is maximum distance to search for matching open-paren.")
2295 (defun blink-matching-open ()
2296 "Move cursor momentarily to the beginning of the sexp before point."
2298 (and (> (point) (1+ (point-min)))
2299 (not (memq (char-syntax (char-after (- (point) 2))) '(?/ ?\\ )))
2300 blink-matching-paren
2301 (let* ((oldpos (point))
2306 (if blink-matching-paren-distance
2307 (narrow-to-region (max (point-min)
2308 (- (point) blink-matching-paren-distance))
2311 (setq blinkpos (scan-sexps oldpos -1))
2313 (and blinkpos (/= (char-syntax (char-after blinkpos))
2316 (/= (char-after (1- oldpos))
2317 (logand (lsh (aref (syntax-table)
2318 (char-after blinkpos))
2321 (if mismatch (setq blinkpos nil))
2324 (goto-char blinkpos)
2325 (if (pos-visible-in-window-p)
2327 (goto-char blinkpos)
2330 ;; Show what precedes the open in its line, if anything.
2332 (skip-chars-backward " \t")
2334 (buffer-substring (progn (beginning-of-line) (point))
2336 ;; Show what follows the open in its line, if anything.
2339 (skip-chars-forward " \t")
2341 (buffer-substring blinkpos
2342 (progn (end-of-line) (point)))
2343 ;; Otherwise show the previous nonblank line.
2345 (buffer-substring (progn
2347 (skip-chars-backward "\n \t")
2350 (progn (end-of-line)
2351 (skip-chars-backward " \t")
2353 ;; Replace the newline and other whitespace with `...'.
2355 (buffer-substring blinkpos (1+ blinkpos))))))))
2357 (message "Mismatched parentheses"))
2358 ((not blink-matching-paren-distance)
2359 (message "Unmatched parenthesis"))))))))
2361 ;Turned off because it makes dbx bomb out.
2362 (setq blink-paren-function 'blink-matching-open)
2364 ;; This executes C-g typed while Emacs is waiting for a command.
2365 ;; Quitting out of a program does not go through here;
2366 ;; that happens in the QUIT macro at the C code level.
2367 (defun keyboard-quit ()
2368 "Signal a quit condition.
2369 During execution of Lisp code, this character causes a quit directly.
2370 At top-level, as an editor command, this simply beeps."
2375 (define-key global-map "\C-g" 'keyboard-quit)
2377 (defun set-variable (var val)
2378 "Set VARIABLE to VALUE. VALUE is a Lisp object.
2379 When using this interactively, supply a Lisp expression for VALUE.
2380 If you want VALUE to be a string, you must surround it with doublequotes.
2382 If VARIABLE has a `variable-interactive' property, that is used as if
2383 it were the arg to `interactive' (which see) to interactively read the value."
2385 (let* ((var (read-variable "Set variable: "))
2386 (minibuffer-help-form
2391 (with-output-to-temp-buffer "*Help*"
2393 (princ "\nDocumentation:\n")
2394 (princ (substring (documentation-property var 'variable-documentation)
2397 (let ((print-length 20))
2398 (princ "\n\nCurrent value: ")
2399 (prin1 (symbol-value var))))
2402 (let ((prop (get var 'variable-interactive)))
2404 ;; Use VAR's `variable-interactive' property
2405 ;; as an interactive spec for prompting.
2406 (call-interactively (list 'lambda '(arg)
2407 (list 'interactive prop)
2409 (eval-minibuffer (format "Set %s to value: " var)))))))
2412 ;; Define the major mode for lists of completions.
2414 (defvar completion-list-mode-map nil)
2415 (or completion-list-mode-map
2416 (let ((map (make-sparse-keymap)))
2417 (define-key map [mouse-2] 'mouse-choose-completion)
2418 (define-key map "\C-m" 'choose-completion)
2419 (define-key map [return] 'choose-completion)
2420 (setq completion-list-mode-map map)))
2422 ;; Completion mode is suitable only for specially formatted data.
2423 (put 'completion-list-mode 'mode-class 'special)
2425 ;; Record the buffer that was current when the completion list was requested.
2426 (defvar completion-reference-buffer)
2428 (defun choose-completion ()
2429 "Choose the completion that point is in or next to."
2432 (skip-chars-forward "^ \t\n")
2434 (skip-chars-backward "^ \t\n")
2436 (choose-completion-string (buffer-substring beg end))))
2438 ;; Delete the longest partial match for STRING
2439 ;; that can be found before POINT.
2440 (defun choose-completion-delete-max-match (string)
2441 (let ((opoint (point))
2442 (len (min (length string)
2443 (- (point) (point-min)))))
2444 (goto-char (- (point) (length string)))
2445 (while (and (> len 0)
2446 (let ((tail (buffer-substring (point)
2448 (not (string= tail (substring string 0 len)))))
2453 (defun choose-completion-string (choice &optional buffer)
2454 (let ((buffer (or buffer completion-reference-buffer)))
2456 (choose-completion-delete-max-match choice)
2458 ;; Update point in the window that BUFFER is showing in.
2459 (let ((window (get-buffer-window buffer t)))
2460 (set-window-point window (point)))
2461 (and (equal buffer (window-buffer (minibuffer-window)))
2462 (minibuffer-complete-and-exit))))
2464 (defun completion-list-mode ()
2465 "Major mode for buffers showing lists of possible completions.
2466 Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\
2467 to select the completion near point.
2468 Use \\<completion-list-mode-map>\\[mouse-choose-completion] to select one\
2471 (kill-all-local-variables)
2472 (use-local-map completion-list-mode-map)
2473 (setq mode-name "Completion List")
2474 (setq major-mode 'completion-list-mode)
2475 (run-hooks 'completion-list-mode-hook))
2477 (defun completion-setup-function ()
2479 (let ((mainbuf (current-buffer)))
2480 (set-buffer standard-output)
2481 (completion-list-mode)
2482 (make-local-variable 'completion-reference-buffer)
2483 (setq completion-reference-buffer mainbuf)
2484 (goto-char (point-min))
2486 (insert (substitute-command-keys
2487 "Click \\[mouse-choose-completion] on a completion to select it.\n")))
2488 (insert (substitute-command-keys
2489 "In this buffer, type \\[choose-completion] to \
2490 select the completion near point.\n\n"))
2493 (while (re-search-forward "[^ \t\n]+" nil t)
2494 (put-text-property (match-beginning 0) (match-end 0)
2495 'mouse-face 'highlight))))))
2497 (add-hook 'completion-setup-hook 'completion-setup-function)
2499 ;;;; Keypad support.
2501 ;;; Make the keypad keys act like ordinary typing keys. If people add
2502 ;;; bindings for the function key symbols, then those bindings will
2503 ;;; override these, so this shouldn't interfere with any existing
2506 ;; Also tell read-char how to handle these keys.
2508 (lambda (keypad-normal)
2509 (let ((keypad (nth 0 keypad-normal))
2510 (normal (nth 1 keypad-normal)))
2511 (put keypad 'ascii-character normal)
2512 (define-key function-key-map (vector keypad) (vector normal))))
2513 '((kp-0 ?0) (kp-1 ?1) (kp-2 ?2) (kp-3 ?3) (kp-4 ?4)
2514 (kp-5 ?5) (kp-6 ?6) (kp-7 ?7) (kp-8 ?8) (kp-9 ?9)
2526 ;;; simple.el ends here